Sure it is. As thick as a 70%-scale, otherwise-perfect-replica Coke can, maybe.

With a variety of innocent household objects, recreated somewhat smaller or larger than normal, trick photography would be within reach of everyman.

Who said it was a bad thing to
have props of various sizes?By simply swapping sets of objects, suddenly your "lizard" can go from slightly-taller-than-a-house to squashing entire blocks of Tokyo in a single footfall!

Widely known to exist. Movies already (well, not quite as often any more) happily use props of different sizes, and shoppers who know where to look can find such props. At best this is a "WIBNI movie props were widely available." However, odd-sized items are already pretty widely available as as collectibles and as toys.

Coke is an especially common example: Coke has produced coke cans and bottles of various sizes, filled with soda, as cigarette lights, etc.